409biscayne

I'm a newbie so please be gentle. I have a 225 V6 in my boat and it needs work , before i go ahead and build the 225 i was wondering if there may be a better Buick motor to do ? Keeping in mind it would need to be compatible with my water cooled exhaust manifolds . I suppose all the latest V6's have a different exhaust port ( mine seem kinda small ) . Have they ever marinized the turbo'd V6 ??? That's enough questions for now . Thanks in advance . Doug